Midori Yamate is a 15 year-old girl and is very much a tomboy. When she was young, Midori meets a boy called Tsukasa Hino, who came to the island she lives on for a holiday. He teaches her to play soccer and she falls in love with the sport. Midori is inspired by Tsukasa and continues to play soccer in hopes that they would meet again someday. When they do meet again Tsukasa does something unforgivable. Determined to defeat Tsukasa on the soccer field Midori enrolls in an all boy high school.

Contains a short story of 2 chapters called Shounen x Cinderella in the 8th and 9th Volumes:
Sakuragi Azuma has a secret that no one should ever know about: he's actually Momo Kasuka, an up and coming female model! While shooting a new drama, he meets another arising newcomer named Yui Hazuki, and things are going to get heated!

Han Ho Jun decided to take a modelling career because he admired Li Tae In. Li Tae In... a skilled top model, and an unparalleled beauty, but was rumored to have a nasty personality. But then, Ho Jun accidentally met Ho Jun's eyes during a rehearsal and they kept running into each other after that. Were those meetings just some coincidences?

From DrMaster:
Yuji Midorikawa is your typical high school student whose has a secret identity: He is "Green" in the high school battalion unit, Gakusei 5 (G5 for short). G5 is the special unit trained to fight and protect Earth against the invasion of the dreaded Galactic force "Gurdark" and its sexy queen Mayura. But Green has a problem. He really can't fight, and always ends up hiding behind his other team mates. What ensues is a witty and wild ride as our "Imperfect Hero" struggles to maintain his reputation as a "guardian of earth" while keeping up his grade point average in school!

One day, I—a high schooler—found a paperback in the hospital. The "Disease Coexistence Journal" was its title. It was a diary that my classmate, Sakura Yamauchi, had written in secret. Inside, it was written that due to her pancreatic disease, her days were numbered. And thus, I coincidentally went from Just-a-Classmate to a Secret-Knowing-Classmate. It was as if I were being drawn to her, who was my polar opposite. However, the world presented the girl that was already suffering from an illness with an equally cruel reality...

In the Yamete Kudasai, series:

V.1 - Yamete Kudasai, Mabushii Desu.
Sasano grew up in an all female household and loves pretty things, including Koga, a schoolmate in another class. What happens when Sasano no longer has to stare at Koga from windows but can be beside him?

V.2 - Yamete Kudasai, Koishii Desu.

This is based on the dating simulation game, Amagami (Gentle Bite). The special focuses on Sae, Ai and Miya, three adolescent girls who are trying to understand their changing bodies and learn how to be "sexy". The chaptered version begins with the story of Tsukasa Ayatsuji, who is the overachieving class representative and planner of the school's Christmas party, and her classmate, Tachibana, who finds himself offering to help her...

From Aerandria Scans:
One day, Mizuho, a university student, receive news that her classmate in high school, Origuchi Haruka, passed away. Mizuho doesn't remember being best friends with Origuchi, but apparently, Origuchi told her mother that Mizuho was her best friend. And now, her mother wants Mizuho to help her find the boy Origuchi dated during high school. Mizuho told Origuchi's mother that Origuchi was a very plain girl, and she was never seen with a guy, but her mother told Mizuho that Origuchi got pregnant and had an abortion when she was in high school. Mizuho was shocked, but she still starts asking her other classmates in high school and following the traces Origuchi left behind.

Note: Won the 58th Shogakukan Manga Award in the Shoujo manga category in 2013.

One day, Yasuke was working up the courage to confess his feelings for his childhood friend Akari. It was the perfect opportunity, since the two of them were going to eat dinner alone together at his family's shrine. Before dinner, he rushes through the daily shrine rituals and accidentally breaks a sacred mirror.
A goddess, who looks like a cute girl, curses him for it, and now he will die if he's ever separated from her. All too late, he learns that she's a goddess of misfortune, and horrible things happen around her whenever she's upset. Will he be able to get the goddess to lift the curse? And how will he ever explain this to Akari?

Life isn't all roses?! Behold the unfolding story of the unavoidable family circumstances and romantic entanglements of the five Matsuno siblings in this erotic and cute omnibus by the new star Yuiji Aniya! The honors student eldest sister is currently head over heels for "Daddy". The rock-and-roll second sister is living the life of peace and love with her new baby in tow. The twin sisters who live in their own world are puzzling over what to do now that they've fallen for the same man. And the youngest child, and only brother, after having to put up with all his sisters, is taking a trip down the rebellious path. But all of them still get along fine and are pretty happy in their own ways.

Links:
Author's pixiv page: https://www.pixiv.net/member.php?id=9660976

A girl named Yari met Kemin on her trip to Taiwan. They really liked each other and had tried every efforts to keep their relationship. However, language difference and time difference had shattered their hope. Two years later, she was on her trip to Taiwan again with love and hope, she found out that he was engaged, but broke up because Kemin loves Yari. Yari and Kemin had a long distance relationship. Soon, Yari had doubts about Kemin and starts to worry that Kemin might be cheating on her. But despite all the doubts, they managed to be together.

From Hoshikuzuu Scans:

Within the two seconds of us locking eyes, I see the invite and follow suit. There are many stories of one-night stands, but doing it in the bathroom at the station to my workplace? That’s a new one. And even when I’ve got a policy to never do the same guy twice, but I just couldn’t forget him. Then I meet him again exactly a week later, same place, same time. And we do it in the bathroom again!!

1) Koori ga Tokeru no o Matteru
As the penalty for losing a bet, Mitsuya has to stand at a popular spot for gay cruising for an hour. There, he's approached by an awkward-looking salaryman named Saitou, who invites him to a nearby love hotel. He doesn't touch Mitsuya, saying "I only need to look," and then...

2) Tsunaide, tsumuide
My life is pointless. The future looks bleak. Should I just end it all right now? Two people who're thinking along these same lines meet.

3-5) Maigo-kun
What appears to be the ghost of a middle-school boy has taken up residence in a college kid's house, and is making a nuisance of itself. But is he really that much of a bother? Is sending him off to rest in peace the right solution?

On the way home from work on Christmas Eve, 26-year-old blue-collar worker Yamada stumbles upon a drunk and crying high school boy and takes him in for the night. This boy, Chihiro, is polite, a good housekeeper, and lives quite close by, so he ends up coming over to Yamada's place from time-to-time to cook for him as thanks for the rescue. Yamada finds out later that the reason Chihiro was so miserable on the day they first met is because he was mulling over being in love with his best friend...

Yoshioka Futaba has a few reasons why she wants to "reset" her image and life as a new high-school student. Because she's cute and had a demure personality she was ostracized by her female friends in junior high, and because of a series of misunderstandings and mishaps, she couldn't get her feeling across to the one boy she has always liked, Tanaka Kou.

Now in high school, she is determined to be as unladylike as possible so that her friends won't be jealous of her. While living her life this way contentedly, she meets Tanaka-kun again, but he now goes under the name of Mabuchi Kou. He tells her that he felt the same way as she did when they were younger, but that they cannot go back. Will Futaba be able to continue her love that never even started from three years ago?

Include in this manga are the following stories:

V.8 - Sono Omokage o Shitteru

From Viz:

Poor Sumi Kitamura… Her irresponsible older brother Eisuke keeps bringing home orphans for her to take care of even though they can barely afford their own basic needs! Just when Sumi's financial problems become dire, wealthy Soichiro Ashida enters her life with a bizarre proposition: he'll provide her with the money she so desperately needs if she agrees to marry him. But can Sumi fool high society into thinking she's a proper lady? Moreover, is it worth giving up everything for this sham of a marriage?

Although she is average in looks and in grades, Sonoda Makoto’s one redeeming feature has been her kindness and willingness to help people. One day, the most handsome boy in school, Mizuno Ruka, requests to speak with her, but that’s not the most shocking part! Suddenly, he pulls out a marriage document and says he wants to marry Makoto! This is the story of a sincere love that shelters you through the rain.

Mika works wonders with a camera, and with her skill, she takes secret photos of the school’s “prince,” Yuuki, and sells them. When Yuuki finds out, he takes her pictures of him and tears them up! Mika then proceeds with a plan to follow him around and take pictures in a “total coverage” of the prince! What will she find out about the boy always in front of her camera, and the one behind the princely mask he wears?

A murder case for the 20th anniversary for the manga of Kindaichi

A collection of short doujin stories by Canno. All slightly romantic, with open endings. −Gold star, happy end −A dead-end, after all −The secret door that fleetingly opens −Welcome to the Occult Research Society! −The bamboo and the tiger −Cinderella −Just waiting for spring −Summer ends 

The lonely and isolated girl named Inori was sent to her grandmathor's villa in overseas for recuperation. There was not one day that she wasn't bored staying in a big house with no one she could talk to until the day she met Haruka, who lightened her world.